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Temporal representation of the distance from
Gd 17 ± 5 0.02 ± 0.02 0.02 ± 0.03 0.004 ± 0.002 6 11 (65) 35 ± 11 0.01 ± 0.01 0.002 ± 0.001 30 6 (16)
Sm 18 ± 5 0.02 ± 0.02 0.02 ± 0.03 0.004 ± 0.001 6 12 (66) 38 ± 12 0.01 ± 0.01 0.002 ± 0.001 33 5 (14)
Nd 57 ± 12 0.1 ± 0.1 0.1 ± 0.1 0.017 ± 0.002 30 28 (47) 220 ± 70 0.06 ± 0.05 0.010 ± 0.0001 180 40 (17)
La 28 ± 7 0.2 ± 0.2 0.05 ± 0.04 0.023 ± 0.008 14 15 (53) 230 ± 60 0.1 ± 0. 1 0.013 ± 0.005 180 52 (23)
FSGD, FAtm and FDiff denote the input fluxes of REEs from SGD, atmospheric dust fallout, and 5-Azacytidine from bottom sediments, respectively and FMix and FMissing denote the output fluxes of REEs mixing with the outer-bay seawater and by unidentified removal, respectively.
Values in the parenthesis indicate the removal proportion (%) of each element.
Table options
In Hampyeong Bay, the input and output fluxes were well-balanced for HREE, Er and Yb, while substantial amounts of L- and MREE were removed (about 5–20%) (Table 2). This result is consistent with the fact that larger removal of LREE relative to M- and HREE is due to the greater particle reactivity of LREE in aqueous environments (Elderfield and Greaves, 1982). However, the removal proportion of REEs by unidentified missing fluxes in Gamak Bay is 40–60% for all REEs; matter cycling is significantly larger than those in Hampyeong Bay. This difference in removal proportion between the two bays seems to be due to the difference in water residence time, resulting in a significantly lower geochemical removal time in Hampyeong Bay.





 
 
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